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韩燚君,董鹏,喇培清,魏玉鹏,郭鑫,盛捷,兰伟.NaCl含量对盐助燃烧合成超细硼化钨粉体相组成和粒度的影响及其作用机制[J].稀有金属材料与工程(英文),2018,47(1):131~138.[Han Yijin,Dong Peng,La Peiqing,Wei Yupeng,Guo Xin,Sheng Jie,Lanwei.Effect and Action Mechanism of NaCl Content on Phase and Size of Submicron Tungsten BoridePowders by Salt-assisted Combustion Synthesis[J].Rare Metal Materials and Engineering,2018,47(1):131~138.]
Effect and Action Mechanism of NaCl Content on Phase and Size of Submicron Tungsten BoridePowders by Salt-assisted Combustion Synthesis
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Received:November 05, 2016  Revised:November 30, 2016
DOI:
Key words: NaCl content  salt-assisted combustion synthesis  morphology  phase  particle size
Foundation item:国家自然科学基金资助(项目号51561020)
Author NameAffiliationE-mail
Han Yijin Lanzhou University of Technology State Key Laboratory of Advanced Processing andRecycling of Non-Ferrous Metal hanyijunhyj@163.com 
Dong Peng Lanzhou University of Technology State Key Laboratory of Advanced Processing andRecycling of Non-Ferrous Metal  
La Peiqing Lanzhou University of Technology State Key Laboratory of Advanced Processing andRecycling of Non-Ferrous Metal  
Wei Yupeng Lanzhou University of Technology State Key Laboratory of Advanced Processing andRecycling of Non-Ferrous Metal  
Guo Xin Lanzhou University of Technology State Key Laboratory of Advanced Processing andRecycling of Non-Ferrous Metal  
Sheng Jie Lanzhou University of Technology State Key Laboratory of Advanced Processing andRecycling of Non-Ferrous Metal  
Lanwei 兰州大学物理科学与技术学院  
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Abstract:
      The diluent NaCl was added into the W-B2O3-Mg system to prepare submicro tungsten boride powders via salt-assisted combustion synthesis. The products were analyzed by XRD, SEM and EDS, and the effect of NaCl content on phase composition, morphology and average particle size of the products were studied. Results show that the combustion synthesis products before leaching mainly consisted of W2B5 and MgO, and the morphology of particles was similar to ellipsoid when without adding NaCl. After adding NaCl, combustion synthesis products before leaching mainly consisted of W2B5, MgO, WB and B, and the morphology of particles were irregular and particles were slightly reunion together. The products after leaching were composed of small size tungsten boride particles, the average grain size decreased with the increasing of NaCl contents, when the content of NaCl k=20, the smallest particle size was 0.85μm. The purity of products after leaching was higher, the content of W and B were up to more than 98%. The biggest content walue of W and B was 98.51% when the content of adding NaCl was 5%.